Sharp do an application note for using touch screens and I believe it has an
8-wire diagram in the document (pdf). It can be found here
http://document.sharpsma.com/Handler/getfile_handler2.asp?nodeid=Documents&fileid33%284C9EFBB74006A8CEC875DE15E7D4
if that works. Failing that go to www.sharpsma.com then MCU then ARM7 then
79524 and it's there.